It is a handkerchief folded once, open air coming in from all sides.
What a fkng idiot. He really was maskless, and he got it.
You need an ASTM level 2 or 3 mask to wear in closed spaces, and lower than that outdoors.
The most useless congressman ever.
Level 3 masks:
Search Amazon for ASTM Level 3 4-Ply Face Masks